Fix compilation issue with clang

src/graph/inference/support/cache.hh

@@ -38,15 +38,16 @@ extern vector<double> __lgamma_cache;
 
 void init_safelog(size_t x);
 
-inline double safelog(auto x)
+template <class T>
+inline double safelog(T x)
 {
     if (x == 0)
         return 0;
     return log(x);
 }
 
-template <bool Init=true>
-inline double safelog_fast(auto x)
+template <bool Init=true, class T>
+inline double safelog_fast(T x)
 {
     if (size_t(x) >= __safelog_cache.size())
     {
@@ -60,13 +61,14 @@ inline double safelog_fast(auto x)
 
 void init_xlogx(size_t x);
 
-inline double xlogx(auto x)
+template <class T>
+inline double xlogx(T x)
 {
     return x * safelog(x);
 }
 
-template <bool Init=true>
-inline double xlogx_fast(auto x)
+template <bool Init=true, class T>
+inline double xlogx_fast(T x)
 {
     if (size_t(x) >= __xlogx_cache.size())
     {
@@ -80,8 +82,8 @@ inline double xlogx_fast(auto x)
 
 void init_lgamma(size_t x);
 
-template <bool Init=true>
-inline double lgamma_fast(auto x)
+template <bool Init=true, class T>
+inline double lgamma_fast(T x)
 {
     if (size_t(x) >= __lgamma_cache.size())
     {

src/graph/inference/support/util.hh

@@ -29,7 +29,8 @@ namespace graph_tool
 {
 using namespace boost;
 
-inline double lbinom(auto N, auto k)
+template <class T1, class T2>
+inline double lbinom(T1 N, T2 k)
 {
     if (N == 0 || k == 0 || k >= N)
         return 0;
@@ -38,15 +39,16 @@ inline double lbinom(auto N, auto k)
     return ((lgamma(N + 1) - lgamma(k + 1)) - lgamma(N - k + 1));
 }
 
-template <bool Init=true>
-inline double lbinom_fast(auto N, auto k)
+template <bool Init=true, class T1, class T2>
+inline double lbinom_fast(T1 N, T2 k)
 {
     if (N == 0 || k == 0 || k > N)
         return 0;
     return ((lgamma_fast<Init>(N + 1) - lgamma_fast<Init>(k + 1)) - lgamma_fast<Init>(N - k + 1));
 }
 
-inline double lbinom_careful(auto N, auto k)
+template <class T1, class T2>
+inline double lbinom_careful(T1 N, T2 k)
 {
     if (N == 0 || k == 0 || k >= N)
         return 0;